Everytime I go for a new box, I always tend to buy something different.
I kind of grew out of the usual cereals like Cocoa pops/Puffs, Frosties, or whatever it is because I always feel like it's too sweet

Recently I've been eating a lot of this

(those white bits, rice crispies I think, are fucking delicious)

these ones are also good, a honey sweet taste with really delicate cornflakes

and I bought these today to try them. They're ok, not on the sweet side.

Also,

these are good too, used to eat these a lot

I usually eat them with milk, but if there's no milk around I'll just go with natural yogurt

I make my own granola (oats, butter and syrup;toasted) with pecans, cashews, dark chocolate chips and dried fruit. Then I usually mix it with bran flakes to make it last longer.
Cinnamon toast crunch (Curiously Cinnamon in the UK) is good shit too though.
Sometimes when I'm feeling unhealthy I go for these bad boys: